Please tell me what public transportation I can use to get from Xian train station ( X I'anbei) to

Do you arrive at North Railway Station and wanna go Grand Mercure On Renmin Square?
If yes, take subway line 2 to Beidajie Station and then transfer to line 1 to Wulukou Station, Exit B. After that, walk southwest around 930 yards to find the hotel.

From the hotel to Terra-Cotta Warriors, you can take a taxi to go to Main Railway Station first. Or just walk there if your physical condition is good.
Then many direct tourist buses 5 (306) at East Square can take you to that scenic spot. The transportation is convenient. Don't worry.